/*
 * This file contains code from "C++ Primer, Fourth Edition", by Stanley B.
 * Lippman, Jose Lajoie, and Barbara E. Moo, and is covered under the
 * copyright and warranty notices given in that book:
 * 
 * "Copyright (c) 2005 by Objectwrite, Inc., Jose Lajoie, and Barbara E. Moo."
 * 
 * 
 * "The authors and publisher have taken care in the preparation of this book,
 * but make no expressed or implied warranty of any kind and assume no
 * responsibility for errors or omissions. No liability is assumed for
 * incidental or consequential damages in connection with or arising out of the
 * use of the information or programs contained herein."
 * 
 * Permission is granted for this code to be used for educational purposes in
 * association with the book, given proper citation if and when posted or
 * reproduced.Any commercial use of this code requires the explicit written
 * permission of the publisher, Addison-Wesley Professional, a division of
 * Pearson Education, Inc. Send your request for permission, stating clearly
 * what code you would like to use, and in what specific way, to the following
 * address: 
 * 
 * 	Pearson Education, Inc.
 * 	Rights and Contracts Department
 * 	75 Arlington Street, Suite 300
 * 	Boston, MA 02216
 * 	Fax: (617) 848-7047
 */

#include <functional>
using std::plus;
using std::negate;

#include <iostream>
using std::cout;
using std::endl;

#include <vector>
#include <algorithm>
using std::count_if;
using std::bind2nd;
using std::not1;
using std::ptr_fun;
using std::less_equal;
using std::vector;

#include <iostream>
using std::cin;

#include <string>
using std::string;

bool size_compare(string s, string::size_type sz) {
	return s.size() >= sz;
}

int fcn_obj() {

	cout << plus<int>()(3, 4) << endl; // prints 7

	plus<int> intAdd;        // function object that can add two int values
	negate<int> intNegate;  // function object that can negate an int value

	// uses intAdd::operator(int, int) to add 10 and 20
	int sum = intAdd(10, 20);        // sum = 30

	cout << sum << endl;

	// uses intNegate::operator(int) to generate -10 as second parameter
	// to intAdd::operator(int, int)
	sum = intAdd(10, intNegate(10));  // sum = 0

	cout << sum << endl;

	int arry[] = { 0, 1, 2, 3, 4, 5, 16, 17, 18, 19 };

	vector<int> vec(arry, arry + 10);

	cout << count_if(vec.begin(), vec.end(), bind2nd(less_equal<int>(), 10));
	cout << endl;

	cout
			<< count_if(vec.begin(), vec.end(),
					not1(bind2nd(less_equal<int>(), 10)));
	cout << endl;

	return 0;
}

//int main(){
//	return fcn_obj();
//}
